Ventricular Function, LeftVentricular Function, RightVentricular Dysfunction, LeftVentricular FunctionStroke VolumeHeart VentriclesEchocardiographyHeartMyocardial ContractionMyocardial InfarctionVentricular Dysfunction, RightSystoleHemodynamicsDiastoleRadionuclide VentriculographyHeart FailureMyocardiumGated Blood-Pool ImagingElectrocardiographyRadionuclide AngiographyEchocardiography, DopplerCoronary CirculationHeart Function TestsHypertrophy, Left VentricularCardiomyopathy, DilatedTime FactorsCardiac CatheterizationVentricular RemodelingCineangiographyHeart RateCoronary DiseaseCardiac VolumeVentriculography, First-PassTreatment OutcomeVentricular PressureCardiac OutputCardiomyopathiesMyocardial IschemiaFollow-Up StudiesEchocardiography, Doppler, PulsedProspective StudiesDobutamineBlood PressureExercise TestAngiocardiographyAtrial Function, LeftCardiotonic AgentsVentricular DysfunctionCoronary AngiographyCoronary Artery BypassMagnetic Resonance Imaging, CineEchocardiography, Doppler, ColorCardiac Pacing, ArtificialTomography, Emission-Computed, Single-PhotonPredictive Value of TestsMitral Valve InsufficiencyDogsPhonocardiographyMyocardial ReperfusionMitral ValveHeart DiseasesCoronary VesselsGold RadioisotopesAortic Valve StenosisAngioplasty, Balloon, CoronaryTricuspid ValveMyocardial Reperfusion InjuryAngina PectorisTechnetium Tc 99m SestamibiAdrenergic beta-AntagonistsPulmonary ArteryEchocardiography, StressPrognosisNatriuretic Peptide, BrainRecovery of FunctionKinetocardiographyCardiac Surgical ProceduresTetralogy of FallotHeart AtriaCineradiographyTransposition of Great VesselsMyocardial StunningHeart AneurysmStreptokinaseVentricular SeptumDisease Models, AnimalArrhythmias, CardiacBlood Flow VelocityMyocardial RevascularizationObserver VariationAnalysis of VarianceTissue SurvivalPacemaker, ArtificialHeart Valve Prosthesis ImplantationHeart SeptumCardiac Output, LowMetoprololEndocardiumExercise ToleranceHeart Valve Prosthesis